software: migrate to PDM-Backend build backend.

This provides us with the same functionality as setuptools with none of
the legacy complexity and issues.

It also means that we use the same vendor for our package management and
package build system, reducing the fragmentation in our dependency tree.

software/.gitignore

@@ -1,11 +1,11 @@
 # Python
+*.pyc
 __pycache__/
-*.egg-info
 /dist
-/build
 
 # pdm
 /.pdm-plugins
 /.pdm-python
+/.pdm-build
 /.venv*
 /pdm.lock

software/pyproject.toml

@@ -1,3 +1,6 @@
+[tool.pdm.version]
+source = "scm"
+
 [project]
 dynamic = ["version"]
 
@@ -108,15 +111,8 @@ radio-nrf24l1 = "glasgow.applet.radio.nrf24l01:RadioNRF24L01Applet"
 # Build system configuration
 
 [build-system]
-requires = ["setuptools>=67.0", "setuptools_scm[toml]>=6.2"]
-build-backend = "setuptools.build_meta"
-
-[tool.setuptools.package-data]
-"glasgow.device" = ["firmware.ihex"]
-
-[tool.setuptools_scm]
-root = ".."
-local_scheme = "node-and-timestamp"
+requires = ["pdm-backend"]
+build-backend = "pdm.backend"
 
 # Development workflow configuration